<span dropdown (onShown)="onShown()" (onHidden)="onHidden()" (isOpenChange)="isOpenChange()">
  <a href id="basic-link" dropdownToggle (click)="false"
     aria-controls="basic-link-dropdown">Click me for a dropdown, yo!</a>
  <ul id="basic-link-dropdown" *dropdownMenu class="dropdown-menu"
      role="menu" aria-labelledby="basic-link">
    <li *ngFor="let choice of items">
      <a class="dropdown-item" href="#">{{choice}}</a>
    </li>
  </ul>
</span>
